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Title: Monolithic integration of enhancement- and depletion-mode AlGaN/GaN HFETs
Authors: Chen, Jing
Cai, Yong
Lau, Kei May
Keywords: Enhancement mode
Compound semiconductor
Gallium nitride
Selective epitaxy
Selective growth
Issue Date: 5-Jul-2011
Citation: US Patent 7,972,915 B2, 2011
Abstract: A method for and devices utilizing monolithic integration of enhancement-mode and depletion-modeAIGaN/GaN heterojunction field-effect transistors (HFETs) is disclosed. Source and drain ohmic contacts of HFETs are first defined. Gate electrodes of the depletion-mode HFETs are then defined. Gate electrodes of the er由ancement-mode HFETs are then defined using fluoride-based plasma treatment and high temperature post-gate annealing ofthe sample. Device isolation is achieved by either mesa etching or fluoride-based plasma treatment.卫lÏ s method provides a complete planar process for GaN -based integrated circuits favored in high-density and high-speed applications.
Rights: This patent is also available at HKUST Technology Transfer Center Patent Search at <>
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